摘要
设计、合成并表征了含有p-n(供电子-吸电子)单元的苝聚酰亚胺PPI,并研究了其作为敏化电极材料的光电池的性能.产物为非晶态.从电子谱中计算出其能带带宽为2.16 eV,用电化学循安伏安法计算得到其电子亲和势(Ea,最低空轨道能级)为-3.97 eV,离子势(IP,最高占据轨道能级的绝对值)为6.13 eV,其能级与二氧化钛的能级相匹配,对二氧化钛有较好的敏化作用.光电池的光电流作用谱(IPCE)与紫外电子谱十分相似,光电压与光强之间有指数的关系. 用苝聚酰亚胺为敏化剂的光电池的光电转换效率为0.0135%.
The perylene polyimide containing donor-acceptor unit was designed, synthesized and characterized by elemental analysis, UV-visible spectrum, gel permeation chromatograph, nuclear magnetic resonance, infrared spectrum, and thermogravimetry. The photovoltaic cell composed of polyimide used as dye sensitizer of TiO2 was prepared and its properties were tested. The polymer is noncrystalline determined by wide angle X-ray diffraction spectrum. Calculated from electron absorption spectrum, the energy of band is 2.16 eV. The electron affinity potential （Ea） （ELUMO） and ionic potential （IP） （-EHOMO） are -3.97 and 6.13eV respectively deduced by the cyclic voltammetry. The energy level of polymer matched the level of TiO2,which has good sensitization effect to TiO2. The overall power conversion efficiency η of the photovoltaic cell is 0.0135%.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
2005年第15期1391-1396,共6页
Acta Chimica Sinica
基金
黑龙江省自然科学基金(No.E0225)资助项目.
